Inner hole clamping groove measuring device

Abstract

The utility model discloses an inner hole clamping groove measuring device, and belongs to the technical field of measuring equipment. The middle parts of the two measuring rods are hinged through a hinged shaft; the front and rear ends of the two measuring rods are respectively provided with a measuring claw and an annular grip; the reset spring is arranged between the front end rod bodies of the two measuring rods; one end of the reset spring is connected with the rear end rod body of one measuring rod; one end of the arc-shaped measuring part penetrates through the rod body at the rear end of one measuring rod, the other end of the arc-shaped measuring part penetrates through the rod body at the rear end of the other measuring rod, the radian of the arc-shaped measuring part is matched with an arc track formed when the two measuring rods are opened and closed, and a positioning device for limiting the arc-shaped measuring part is arranged on the rod body at the rear end of the measuring rod penetrated by the arc-shaped measuring part. According to the utility model, measurement data can be directly read, the operation is simple and convenient, and the measurement efficiency can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of measuring equipment technology, and specifically relates to an internal hole groove measuring device. Background Technology

[0002] In modern manufacturing processes, accurate measurement is a crucial element in ensuring product quality and efficiency. Calipers, as a commonly used measuring tool, are widely used in machining, mold making, and precision instrument assembly. Calipers can measure the inner or outer diameter of workpieces by opening and closing. However, existing calipers have limitations when measuring the diameter of inner hole grooves in workpieces. After the measuring end of the caliper is inserted into the inner hole, it needs to be manually opened so that the measuring end abuts against the inner hole groove. Simultaneously, the operator must keep the caliper stationary while using a measuring tool to measure the handle end of the caliper. This operation is not only cumbersome but also increases measurement time, making it difficult for a single person to operate. The inefficiency is particularly pronounced when frequently measuring multiple workpieces, and it also increases the possibility of measurement errors.

[0003] Therefore, there is a need for an internal hole slot measuring device that is easy to operate and can directly read measurement data. Utility Model Content

[0004] The purpose of this invention is to provide an internal hole groove measuring device that can directly read measurement data, is easy to operate, and can effectively improve measurement efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An internal hole groove measuring device includes two measuring rods hinged together at the middle, with measuring claws and annular handles at both ends of the two measuring rods, a return spring disposed between the front ends of the two measuring rods, and an arc-shaped measuring component with one end connected to the rear end of one measuring rod and the other end penetrating through the rear end of the other measuring rod. The curvature of the arc-shaped measuring component is adapted to the arc trajectory formed when the two measuring rods open and close. A positioning device for limiting the arc-shaped measuring component is provided on the rear end of the measuring rod penetrating through it.

[0007] A further improvement of this utility model is that: the top of the rear end of one measuring rod is provided with an installation groove for the arc-shaped measuring component, and the rear end of the other measuring rod is provided with a through hole for the arc-shaped measuring component along its width direction, and a digital display hole is provided on the rod above the through hole.

[0008] A further improvement of this utility model is that: one end of the arc-shaped measuring component is detachably connected to the mounting groove on the rear end of one of the measuring rods, and the other end passes through the through hole on the rear end of another measuring rod and is provided with a stop block at its end; the diameter of the stop block is larger than the diameter of the through hole.

[0009] A further improvement of the present invention is that: the arc-shaped measuring component includes an arc-shaped scale and an arc-shaped magnet integrally formed with the arc-shaped scale and disposed on one side of the arc-shaped scale; the positioning device includes a magnetic suction rod that is hinged to the measuring rod body above the through hole by a pin and is adapted to the arc-shaped magnet.

[0010] A further improvement of this utility model is that: a pointer adapted to an arc-shaped scale is provided on one side of the digital display hole; the length of the reset spring when it is reset is adapted to the maximum distance when the two measuring rods are open.

[0011] A further improvement of this utility model is that grooves are respectively opened on the outer side walls of the front ends of the two measuring rods along their length direction. The measuring claw is a right-angled triangle structure, with one end of its short right-angled side inserted into the groove and hinged to the side walls of the measuring rods on both sides of the groove through a rotating shaft. A spherical measuring head is provided at the opposite end of its short right-angled side.

[0012] A further improvement of this utility model is that: the front ends of the two measuring rods are respectively provided with baffles extending outwards, and when the measuring claw rotates around its axis, one side of its long right-angled side can be connected to the baffle through fasteners.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This utility model of an internal hole groove measuring device can directly read measurement data, and while being easy to operate, it can effectively improve measurement efficiency.

[0015] This invention employs two measuring rods hinged together at the center. Each measuring rod has a measuring claw and a ring-shaped handle at both its front and rear ends. A return spring is installed between the front ends of the two measuring rods. One end of an arc-shaped measuring component is connected to the rear end of one of the measuring rods, and the other end passes through the rear end of the other measuring rod. The arc of the arc-shaped measuring component matches the arc trajectory formed when the two measuring rods open and close. Therefore, as the two measuring rods open and close, the rear end of the measuring rod penetrated by the arc-shaped measuring component can move along the arc-shaped measuring component. When measuring the inner hole groove, the operator can hold the two centrally hinged measuring rods using the two ring-shaped handles. Clamp the two measuring rods together so that their front and rear ends are close together. At this time, the return spring located between the front ends of the two measuring rods is compressed, and the distance between the measuring claws at the front ends of the two measuring rods decreases, allowing them to easily extend into the inner hole slot. Once in the slot, the operator can release the ring handle of one of the measuring rods, causing the two measuring rods to automatically open under the action of the return spring. At this time, the front and rear ends of the two measuring rods are relatively far apart, and the distance between the measuring claws at the front ends of the two measuring rods increases, abutting against the slot. The operator can quickly read the dimensional data directly through the arc-shaped measuring component at the rear end of the measuring rod. This operation is simple and can effectively improve measurement efficiency.

[0016] This invention employs a positioning device on the rear end of the measuring rod through which the arc-shaped measuring component passes, thereby limiting the arc-shaped measuring component during measurement, preventing relative movement of the two measuring rods during the reading process, and improving the accuracy of the measurement.

[0017] This invention employs a mounting groove on the top of the rear end of one measuring rod, and a through hole on the rear end of the other measuring rod. A digital display hole is also provided above the through hole. One end of the arc-shaped measuring component is detachably connected to the mounting groove on the rear end of one measuring rod, and the other end passes through the through hole on the rear end of the other measuring rod. The operator can visually observe and read the dimensional data on the arc-shaped measuring component through the digital display hole.

[0018] The arc-shaped measuring component of this utility model includes an arc-shaped scale and an arc-shaped magnet integrally formed with the arc-shaped scale. Correspondingly, the positioning device includes a magnetic rod hinged to the measuring rod body above the through hole via a pin. The magnetic rod is adapted to the arc-shaped magnet. When positioning the arc-shaped measuring component is required, the magnetic rod can be moved to attract the arc-shaped magnet of the arc-shaped measuring component, preventing relative movement of the two measuring rods during the reading process, thus ensuring measurement accuracy. Before and after measurement, the magnetic rod can be moved to separate it from the arc-shaped magnet of the arc-shaped measuring component, allowing the two measuring rods to move relative to each other. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal hole groove measuring device of this utility model;

[0020] Figure 2 This is a schematic diagram of the assembly of the arc-shaped measuring component and the two measuring rods in the internal hole groove measuring device of this utility model;

[0021] Figure 3 This is an assembly diagram of the measuring claw and measuring rod in the internal hole groove measuring device of this utility model;

[0022] Among them, 1. Measuring rod, 1-1. Groove, 1-2. Baffle, 1-3. Fastener, 1-4. Digital display hole, 1-5. Mounting slot, 1-6. Through hole, 1-7. Pointer, 2. Measuring claw, 2-1. Rotating shaft, 2-2. Spherical measuring head, 3. Ring grip, 4. Hinge shaft, 5. Return spring, 6. Arc-shaped measuring component, 6-1. Arc-shaped scale, 6-2. Arc-shaped magnet, 6-3. Stop block, 7. Magnetic suction rod. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to embodiments:

[0024] like Figure 1 As shown, this utility model provides an internal hole slot measuring device, including two measuring rods 1, a return spring 5, and an arc-shaped measuring component 6. The middle parts of the two measuring rods 1 are hinged by a hinge shaft 4, so that the front and rear ends of the two measuring rods 1 can be relatively close and far apart, thereby realizing the opening and closing of the two measuring rods 1. The front and rear ends of the two measuring rods 1 are respectively provided with measuring claws 2 and ring handles 3. The return spring 5 is located between the front ends of the two measuring rods 1. The length of the return spring 5 when it is reset is adapted to the maximum distance when the two measuring rods 1 are opened. One end of the arc-shaped measuring component 6 is connected to the rear end of one of the measuring rods 1, and the other end passes through the rear end of the other measuring rod 1. The arc of the arc-shaped measuring component 6 is adapted to the arc trajectory formed when the two measuring rods 1 open and close.

[0025] Therefore, as the two measuring rods 1 open and close, the rear end of the measuring rod pierced by the arc-shaped measuring component 6 can move along the arc-shaped measuring component 6. When measuring the inner hole groove, the operator can hold the two measuring rods 1 hinged in the middle through the two ring handles 3 and clamp the two measuring rods 1 in the middle so that the front and rear ends of the rods are relatively close. At this time, the return spring 5 located between the front ends of the two measuring rods 1 is compressed, and the distance between the measuring claws 2 at the front ends of the two measuring rods becomes smaller, so that they can be easily inserted into the inner hole groove. After reaching the groove position, the operator can release the ring handle 3 of one of the measuring rods 1, so that the two measuring rods 1 automatically open under the action of the return spring 5. At this time, the front and rear ends of the two measuring rods 1 are relatively far apart, and the distance between the measuring claws 2 at the front ends of the two measuring rods 1 becomes larger and abuts against the groove. The operator can quickly read the size data directly through the arc-shaped measuring component 6 at the rear end of the measuring rod 1. The operation is simple and can effectively improve the measurement efficiency.

[0026] like Figure 2 As shown, one of the measuring rods 1 has a mounting groove 1-5 at the top of its rear end for fitting the arc-shaped measuring component 6, and the other measuring rod 1 has a through hole 1-6 along its width direction for fitting the arc-shaped measuring component 6. That is, the length of the through hole 1-6 is greater than the width of the arc-shaped measuring component 6, and the shape of the through hole 1-6 is also arc-shaped and matches the arc-shaped measuring component 6, so that the arc-shaped measuring component 6 can move smoothly within the through hole 1-6. One end of the arc-shaped measuring component 6 is detachably connected to the mounting groove 1-5 on the rear end of one of the measuring rods 1. Preferably, one end of the arc-shaped measuring component 6 is connected to the mounting groove 1-5 on the rear end of one of the measuring rods 1 by bolts, so that the arc-shaped measuring component 6 can be easily and quickly disassembled and the entire measuring device can be stored. The other end of the arc-shaped measuring component 6 passes through the through hole 1-6 on the rear end of another measuring rod 1 and a stop block 6-3 is provided at its end. The diameter of the stop block 6-3 is larger than the diameter of the through hole 1-6 to prevent the arc-shaped measuring component 6 from coming out of the through hole 1-6. A digital display hole 1-4 is provided through the rod above the through hole 1-6, and the operator can intuitively observe and read the dimensional data on the arc-shaped measuring component 6 through the digital display hole 1-4.

[0027] In order to limit the arc-shaped measuring component 6 during measurement, prevent the two measuring rods 1 from moving relative to each other during the reading process, and improve the accuracy of the measurement, a positioning device is provided on the rear end of the measuring rod 1 through which the arc-shaped measuring component 6 is penetrated, which can limit the arc-shaped measuring component 6.

[0028] Specifically, the arc-shaped measuring component 6 includes an arc-shaped scale 6-1 and an arc-shaped magnet 6-2. The arc-shaped magnet 6-2 is located on one side of the arc-shaped scale 6-1, and the arc-shaped magnet 6-2 and the arc-shaped scale 6-1 are integrally formed. The positioning device includes a magnetic suction rod 7, which is hinged to the measuring rod 1 above the through hole 1-6 by a pin. The magnetic suction rod 7 is adapted to the arc-shaped magnet 6-2, that is, the magnetic suction rod 7 and the arc-shaped magnet 6-2 are the N pole and the S pole, respectively. Specifically, a magnet is provided at the bottom of the magnetic suction rod 7, and this magnet is the N pole and the arc-shaped magnet 6-2, respectively. When positioning the arc-shaped measuring component 6 is required, the magnetic rod 7 can be moved to attach it to the arc-shaped magnet 6-2 of the arc-shaped measuring component 6, preventing relative movement of the two measuring rods 1 during the reading process and thus ensuring measurement accuracy. Before and after measurement, the magnetic rod 7 can be moved to separate it from the arc-shaped magnet 6-2 of the arc-shaped measuring component 6, allowing the two measuring rods 1 to move relative to each other. To more accurately read the dimensional data on the arc-shaped scale 6-1, a pointer 1-7 adapted to the arc-shaped scale 6-1 is provided on one side of the digital display hole 1-4. The pointer 1-7 can accurately point to the scale line on the arc-shaped scale 6-1. The scale line on the arc-shaped scale 6-1 is designed to match the distance between the ends of the two measuring claws 2.

[0029] like Figure 3 As shown, for easy storage, grooves 1-1 are respectively opened on the outer side walls of the front ends of the two measuring rods 1 along their length direction. The measuring claw 2 has a right-angled triangular structure, with one end of its short right-angled side inserted into the groove 1-1 and hinged to the side walls of the measuring rods 1 on both sides of the groove 1-1 through a pivot 2-1. A spherical measuring head 2-2 is provided at the opposite end of its short right-angled side. The spherical measuring head 2-2 can effectively prevent scratches on the inner hole groove during the measurement process. In addition, the front ends of the two measuring rods 1 are respectively provided with baffles 1-2 extending outward. When measurement is required, the measuring claw 2 can be rotated around its axis 2-1 so that one side of its long right angle is connected to the baffle 1-2 through the fastener 1-3. When storing, the fastener 1-3 can be loosened, and the measuring claw 2 can be rotated around its axis 2-1 to approach the outer wall of the measuring rod 1. At the same time, the arc-shaped measuring component 6 can be removed from the measuring rod 1 so that the entire measuring device can be stored. Preferably, the fastener 1-3 is a bolt, but other components with fastening functions can also be used.

[0030] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An internal hole groove measuring device, characterized in that: The device includes two measuring rods (1) hinged together in the middle by a hinge shaft (4), with measuring claws (2) and ring handles (3) at the front and rear ends of the two measuring rods (1), a return spring (5) set between the front ends of the two measuring rods (1), and an arc-shaped measuring component (6) with one end connected to the rear end of one of the measuring rods (1) and the other end passing through the rear end of the other measuring rod (1). The arc of the arc-shaped measuring component (6) is adapted to the arc trajectory formed when the two measuring rods (1) open and close. A positioning device for limiting the arc-shaped measuring component (6) is provided on the rear end of the measuring rod (1) through which the arc-shaped measuring component (6) passes.

2. The internal hole groove measuring device according to claim 1, characterized in that: One of the measuring rods (1) has a mounting groove (1-5) for the arc-shaped measuring component (6) at the top of its rear end. The other measuring rod (1) has a through hole (1-6) for the arc-shaped measuring component (6) through its width direction, and a digital display hole (1-4) is provided on the rod above the through hole (1-6).

3. The internal hole groove measuring device according to claim 2, characterized in that: One end of the arc-shaped measuring component (6) is detachably connected to the mounting groove (1-5) on the rear end of one of the measuring rods (1), and the other end passes through the through hole (1-6) on the rear end of the other measuring rod (1) and is provided with a stop block (6-3) at its end; the diameter of the stop block (6-3) is larger than the diameter of the through hole (1-6).

4. The internal hole groove measuring device according to claim 3, characterized in that: The arc-shaped measuring component (6) includes an arc-shaped scale (6-1) and an arc-shaped magnet (6-2) integrally formed with the arc-shaped scale (6-1) and disposed on one side of the arc-shaped scale (6-1); the positioning device includes a magnetic suction rod (7) that is hinged to the measuring rod (1) above the through hole (1-6) by a pin and is adapted to the arc-shaped magnet (6-2).

5. The internal hole groove measuring device according to claim 4, characterized in that: A pointer (1-7) adapted to the arc-shaped scale (6-1) is provided on one side of the digital display hole (1-4); the length of the reset spring (5) when it is reset is adapted to the maximum distance when the two measuring rods (1) are open.

6. The internal hole groove measuring device according to claim 1, characterized in that: The two measuring rods (1) have grooves (1-1) respectively opened on the outer side wall of their front end along their length direction. The measuring claw (2) is a right-angled triangle structure. One end of its short right-angled side is inserted into the groove (1-1) and is hinged to the side wall of the measuring rod (1) on both sides of the groove (1-1) through a rotating shaft (2-1). A spherical measuring head (2-2) is provided at the opposite end of its short right-angled side.

7. The internal hole groove measuring device according to claim 6, characterized in that: The front ends of the two measuring rods (1) are respectively provided with baffles (1-2) extending outward. When the measuring claw (2) rotates around its axis (2-1), one side of its long right-angle side can be connected to the baffle (1-2) by fasteners (1-3).

Images